Buggy code:
public class XpandComponent extends AbstractExpressionsUsingWorkflowComponent { private String _genPath = null ; private String _srcPath = null ; private String _expand = null ; private String _fileEncoding = null ; private boolean _automaticHyphens = false ; private Output _output = null ; private final List < Outlet > _outlets = new ArrayList < Outlet > ( ) ; private List < PostProcessor > _postprocessors = new ArrayList < PostProcessor > ( ) ; private List < Outlet > _initializedOutlets = new ArrayList < Outlet > ( ) ; private String _ignoreList ; private boolean _defaultExcludes ; private boolean _useBase64 ; public List < PostProcessor > getBeautifier ( ) { } public void addBeautifier ( PostProcessor beautifier ) { } public List < PostProcessor > getPostprocessors ( ) { } public void addPostprocessor ( PostProcessor postprocessor ) { } public void setAutomaticHyphens ( boolean automaticHyphens ) { } @ Override public String getLogMessage ( ) { } public void setFileEncoding ( final String fileEncoding ) { } public String getFileEncoding ( ) { } public void setExpand ( String invoke ) { } @ Deprecated public void setGenPath ( final String genPath ) { } @ Deprecated public void setSrcPath ( final String srcPath ) { } public void setIgnoreList ( String ignoreList ) { } public void setDefaultExcludes ( boolean defaultExcludes ) { } public void setUseBase64 ( boolean useBase64 ) { } private String fixPath ( final String p ) { } @ Override protected void invokeInternal2 ( WorkflowContext wfContext , ProgressMonitor monitor , Issues issues ) { } public void addOutlet ( Outlet outlet ) { } public void setOutput ( Output output ) { } private Output getOutput ( ) { } private List < Outlet > getInitializedOutlets ( ) { } private ExpandStatement getStatement ( ) { } @ Override public void checkConfigurationInternal ( final Issues issues ) { <START_BUG> super . checkConfiguration ( issues ) ; <END_BUG> if ( ( ( _genPath ) == null ) && ( getInitializedOutlets ( ) . isEmpty ( ) ) ) issues . addError ( this , "You<seq2seq4repair_space>need<seq2seq4repair_space>to<seq2seq4repair_space>configure<seq2seq4repair_space>at<seq2seq4repair_space>least<seq2seq4repair_space>one<seq2seq4repair_space>outlet!" ) ; if ( ( ( ( _genPath ) != null ) || ( ( _srcPath ) != null ) ) && ( ! ( _outlets . isEmpty ( ) ) ) ) issues . addWarning ( this , "'genPath'<seq2seq4repair_space>is<seq2seq4repair_space>ignored<seq2seq4repair_space>since<seq2seq4repair_space>you<seq2seq4repair_space>have<seq2seq4repair_space>specified<seq2seq4repair_space>outlets!" ) ; int defaultOutlets = 0 ; for ( final Iterator < Outlet > iter = getInitializedOutlets ( ) . iterator ( ) ; iter . hasNext ( ) ; ) { final Outlet o = iter . next ( ) ; if ( ( o . getName ( ) ) == null ) defaultOutlets ++ ; } if ( defaultOutlets > 1 ) issues . addError ( this , "Only<seq2seq4repair_space>one<seq2seq4repair_space>outlet<seq2seq4repair_space>can<seq2seq4repair_space>be<seq2seq4repair_space>the<seq2seq4repair_space>default<seq2seq4repair_space>outlet.<seq2seq4repair_space>Please<seq2seq4repair_space>specifiy<seq2seq4repair_space>a<seq2seq4repair_space>name<seq2seq4repair_space>for<seq2seq4repair_space>the<seq2seq4repair_space>other<seq2seq4repair_space>outlets!" ) ; else if ( defaultOutlets == 0 ) issues . addWarning ( this , "No<seq2seq4repair_space>default<seq2seq4repair_space>outlet<seq2seq4repair_space>configured!" ) ; if ( ( _expand ) == null ) issues . addError ( this , "property<seq2seq4repair_space>'expand'<seq2seq4repair_space>not<seq2seq4repair_space>configured!" ) ; else { try { final ExpandStatement es = getStatement ( ) ; if ( es == null ) { issues . addError ( this , "property<seq2seq4repair_space>'expand'<seq2seq4repair_space>has<seq2seq4repair_space>wrong<seq2seq4repair_space>syntax!" ) ; } } catch ( ParseException e ) { issues . addError ( this , ( "property<seq2seq4repair_space>'expand'<seq2seq4repair_space>has<seq2seq4repair_space>wrong<seq2seq4repair_space>syntax<seq2seq4repair_space>:<seq2seq4repair_space>" + ( e . getMessage ( ) ) ) ) ; } } } }

Fix:
super . checkConfigurationInternal ( issues ) ;